If affirmative action was being applied with the same care as a scientific study, then you might be able to say that it's moral discrimination. But it's not. I

If affirmative action was being applied with the same care as a scientific study, then you might be able to say that it's moral discrimination. But it's not. It's being applied with the same level of knee-jerk emotional reaction and sloppiness of classic "I don't like people of skin color x" racial prejudice - which is what it is. The theory that you're describing is quite different from what is being applied in the real world.